arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0812.3640cond-mat.dis-nn
收藏

真正的自旋眼镜放松缓慢的树荫下分层树

Real spin glasses relax slowly in the shade of hierarchical trees

Eric Vincent, J. Hammann, Miguel Ocio

摘要:

平均场自旋玻璃的Parisi解已被广泛接受和庆祝。然而,它在3d中的边缘稳定性及其复杂性提出了它与真实自旋玻璃相关性的问题。本文给出了一个简短的概述的重要实验结果,可以理解的平均场的解决方案。理论预测的真实相变的存在和磁化率在凝固温度以下的特殊行为,都被实验结果清楚地证实了。复序参量和涨落耗散比的行为与自发噪声测量结果吻合得很好。非常特殊的超度规对称性是该理论的关键特征,它为我们提供了一个简单的描述,说明了在实验中观察到的恢复活力和记忆效应。最后,超越平均场的一步,本文简要地讨论了新的分析,其特征在于其长度尺度的相关领域,以及新的实验比较以及与最近的理论模拟的超自旋玻璃。

英文摘要:

The Parisi solution of the mean-field spin glass has been widely accepted and celebrated. Its marginal stability in 3d and its complexity however raised the question of its relevance to real spin glasses. This paper gives a short overview of the important experimental results which could be understood within the mean-field solution. The existence of a true phase transition and the particular behaviour of the susceptibility below the freezing temperature, predicted by the theory, are clearly confirmed by the experimental results. The behaviour of the complex order parameter and of the Fluctuation Dissipation ratio are in good agreement with results of spontaneous noise measurements. The very particular ultrametric symmetry, the key feature of the theory, provided us with a simple description of the rejuvenation and memory effects observed in experiment. Finally, going a step beyond mean-field, the paper shortly discusses new analyses in terms of correlated domains characterized by their length scales, as well as new experiments on superspin glasses which compare well with recent theoretical simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑